def main():
    N = int(input())
    L = list(map(int, input().split()))
    L = sorted(L)
    count = 0

    for i in range(N-2):
        for j in range(i+1, N):
            for k in range(j+1, N):
                if L[i] + L[j] > L[k] and L[i] != L[j] != L[k]:
                    count += 1

    print(count)


if __name__ == '__main__':
    main() def main():
    N = int(input())
    L = list(map(int, input().split()))
    L = sorted(L)
    count = 0

    for i in range(N-2):
        for j in range(i+1, N):
            for k in range(j+1, N):
                if L[i] + L[j] > L[k] and L[i] != L[j] != L[k]:
                    count += 1

    print(count) main N = int(input()) N int(input()) int input() input L = list(map(int, input().split())) L list(map(int, input().split())) list map(int, input().split()) map int input().split() ().split () input split L = sorted(L) L sorted(L) sorted L count = 0 count 0 for i in range(N-2):
        for j in range(i+1, N):
            for k in range(j+1, N):
                if L[i] + L[j] > L[k] and L[i] != L[j] != L[k]:
                    count += 1

     i range(N-2) range N-2 N 2 for j in range(i+1, N):
            for k in range(j+1, N):
                if L[i] + L[j] > L[k] and L[i] != L[j] != L[k]:
                    count += 1

     j range(i+1, N) range i+1 i 1 N for k in range(j+1, N):
                if L[i] + L[j] > L[k] and L[i] != L[j] != L[k]:
                    count += 1

     k range(j+1, N) range j+1 j 1 N if L[i] + L[j] > L[k] and L[i] != L[j] != L[k]:
                    count += 1

     L[i] + L[j] > L[k] and L[i] != L[j] != L[k] L[i] + L[j] > L[k] L[i] + L[j] L[i] L i L[j] L j L[k] L k L[i] != L[j] != L[k] L[i] != L[j] L[i] L i L[j] L j L[k] L k count += 1 count 1 print(count) print count if __name__ == '__main__':
    main() __name__ == '__main__' __name__ '__main__' main() main def main():
    N = int(input())
    L = list(map(int, input().split()))
    L = sorted(L)
    count = 0

    for i in range(N-2):
        for j in range(i+1, N):
            for k in range(j+1, N):
                if L[i] + L[j] > L[k] and L[i] != L[j] != L[k]:
                    count += 1

    print(count) def main():
    N = int(input())
    L = list(map(int, input().split()))
    L = sorted(L)
    count = 0

    for i in range(N-2):
        for j in range(i+1, N):
            for k in range(j+1, N):
                if L[i] + L[j] > L[k] and L[i] != L[j] != L[k]:
                    count += 1

    print(count) main
def main():
    N = int(input())
    L = list(map(int, input().split()))
    L = sorted(L)
    count = 0

    for i in range(N-2):
        for j in range(i+1, N):
            for k in range(j+1, N):
                if L[i] + L[j] > L[k] and L[i] != L[j] != L[k]:
                    count += 1

    print(count)


if __name__ == '__main__':
    main()